Back to results
US 7,731,866 B2Granted
2,5-linked polyfluorenes for optoelectronic devices
AssigneeGeneral Electric Company
InventorsJames Anthony Cella, Joseph John Shiang, Elliott West Shanklin, Paul Michael Smigelski
Life of this patent
Estimating the term…
Abstract
Polyfluorene polymers and copolymers having substantial amounts (10-100%) of fluorenes coupled at the 2 and 5 positions of fluorene are useful as active layers in OLED devices where triplet energies >2.10 eV are required.
Claims22
A polymer comprising greater than about 10% by weight of structural units derived from a compound of formula I
- wherein R1 and R2 are independently at each occurrence H, C1-20 hydrocarbyl, C1-20 hydrocarbyl containing one or more S, N, O, P or Si atoms, C4-16 hydrocarbyl carbonyloxy, C4-16 aryl(trialkylsiloxy) or R1 and R2 taken together with an intervening carbon atom form a C5-20 hydrocarbyl ring or a C4-20 hydrocarbyl ring containing at least one S, N or O heteroatom;
- R3 and R4 are independently at each occurrence C1-20 hydrocarbyl, C1-20 hydrocarbyloxy, C1-20 thioether, C1-20 hydrocarbylcarbonyloxy or cyano;
- X is independently at each occurrence halo, triflate, —B(OH)2, —B(OR)2, —BO2R, or a combination thereof;
- R is alkyl or alkylene;
- and
- a and b are independently 0 or 1.
3 more elements
A polymer comprising greater than about 10% by weight of structural units derived from a compound of formula II
- wherein R1 and R2 are independently at each occurrence H, C1-20 hydrocarbyl, C1-20 hydrocarbyl containing one or more S, N, O, P or Si atoms, C4-16 hydrocarbyl carbonyloxy, C4-16 aryl(trialkylsiloxy) or R1 and R2 taken together with an intervening carbon atom form a C5-20 hydrocarbyl ring or a C4-20 hydrocarbyl ring containing at least one S, N or O heteroatom;
- R3 and R4 are independently at each occurrence H, C1-20 hydrocarbyl, C1-20 hydrocarbyloxy, C1-20 thioether, C1-20 hydrocarbylcarbonyloxy or cyano;
- one of X and Y is halo or triflate and the other one of X and Y is —B(OH)2, —B(OR)2, or —BO2R;
- R is alkyl or alkylene;
- and
- a and b are independently 0 or 1.
3 more elements
Dependencies are inferred from the claim text.